Challenge Gravel Grinder Race Tire - Tubeless, Folding, Black Size:70x38 The 52mm deep front slices

The 52mm deep front slices through the air while still guaranteeing predictable handling in crosswinds

Wider wheels and tires are faster aerodynamically

and city riding

silver colored interior makes it easy to find contents

crafted from 6066 series aluminum

Challenge Gravel Grinder Race Tire - Tubeless, Folding, Black Size:70x38 The 52mm deep front slicesIntended for all around or dirt gravel roads, this tire comes equipped with a file tread center and a knobbier shoulder tread. File tread center pattern offers low rolling resistance on smoother terrain and increased grip when the road gets rough Shoulder tread is more aggressive for corner confidence and additional control The Gravel Grinder is ideal for hardpack, gravel, sand, loose, and rocky terrains